163405 has 8 divisors (see below), whose sum is σ = 213984. Its totient is φ = 118800.

The previous prime is 163403. The next prime is 163409. The reversal of 163405 is 504361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163405 - 2¹ = 163403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (26748).

2¹⁶³⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

163405 is a deficient number, since it is larger than the sum of its proper divisors (50579).

163405 is a wasteful number, since it uses less digits than its factorization.

163405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 163405 is about 404.2338432145. The cubic root of 163405 is about 54.6707603187.

Adding to 163405 its reverse (504361), we get a palindrome (667766).

The spelling of 163405 in words is "one hundred sixty-three thousand, four hundred five".